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Size of Tile | 420mm x 330mm |
Minimum Pitch | 22.5° Smooth (75mm headlap) 17.5° Smooth (100mm headlap) |
Maximum Pitch | 90° |
Minimum Headlap | 75mm (22.5°and above) 100mm (below 22.5°) |
Maximum Gauge | 345mm |
Cover Width | 295mm (nominal) |
Covering Capacity | 9.7 slates/m² at 75mm headlap 10.5 slates/m² at 100mm headlap |
Weight of Tiling | 44kg/m² (0.43kN/m²) at 75mm headlap 47.5kg/m² (0.47kN/m²) at 100mm headlap |
Battens Required | 2.9 lin.m/m² at 75mm headlap 3.1 lin.m/m² at 100mm headlap |
Batten Size Recommended | 38 x 25mm for rafters/supports not exceeding 450mm centres 50 x 25mm for rafters/supports not exceeding 600mm centres |
Tile Nails | 45mm x 3.35mm |
Hanging length | 395mm (nominal) |
Fixing clips | Eaves, verge and slate clips |
Authority | BS EN 490 |
Notes | Nominal weight of roof tile fittings |